Technical information

Screen Messages . . . . . . . . . . . . . . . . . . . . . . . . . 206
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
General Problems . . . . . . . . . . . . . . . . . . . . . . . . . 210
What If Testing Cannot Find the Problem? ............ 211
Battery Power Problems ..................... 211
Diskette Drive Problems ..................... 213
Mwave DSP Feature Problems ................. 213
Infrared Communication Problems ............... 214
Software Problems . . . . . . . . . . . . . . . . . . . . . . . . 215
Option Problems . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Keyboard, External Numeric Keypad, and Pointing Device
Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
External Display Problems .................... 218
Printer Problems . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Intermittent Problems . . . . . . . . . . . . . . . . . . . . . . . 220
Listing Installed Options ....................... 221
Recording Identification Numbers ................. 222
Getting Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
The IBM HelpClub: Another Great Choice (for European
Countries) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Appendix A. Avoiding Hardware Conflicts .......... 227
Appendix B. Advanced Information for PC Cards ...... 231
Auto Configurator for the PC Card Director Program ...... 231
Example When a Modem Card Is Used ............ 232
Example When the Auto Configurator Is Not Used ...... 232
Example of the Memory Area for the Card Services and 3270 233
Operational Considerations for PCMCIA ............. 234
Software Considerations for OS/2 ................ 234
Software Considerations for DOS ................ 235
Software Considerations for Windows ............. 242
Appendix C. Additional Information for Mwave DSP
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Audio Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Mwave MIDI Overview ...................... 244
Telephony Information . . . . . . . . . . . . . . . . . . . . . . . . 247
Appendix D. Features and Specifications ........... 249
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
IBM Power Cords ........................... 252
Diskette Standards . . . . . . . . . . . . . . . . . . . . . . . . . . 254
xiv IBM ThinkPad 755CX User's Guide